Discharge funnel for kilns



0a. 14, 1930. I E. S-OBEK 1,778,281

DISCHARGE FUNNEL FOR KILNS Filed Aug. 28, 1928 2 Sheets-Sheet l l 1 Al 9 F lnu u n 0 n u n Oct. 14, 1930. E. SOBEK 1,778,281

DISCHARGE FUNNEL FOR KILNS 2 Sheets-Sheet 2 Filed Aug. 28, 1928 Patented Oct. 1 4, 1930 UNITED STATES EMANUEL SOBEK, OF VIENNA, AUSTRIA DISCHARGE FUNNEL FOR KILNS Application filed August 28, 1928, Serial No. 302,508, and in Czechoslovakia January 19, 1928.

This invention relates to a discharge funnel of the type for which Letters Patent No. 1,668,825 have been granted me and which is employed in connection with kilns for burning lime, sintering dolomite and furnaces for roasting iron ores and the like, and has for its object to insure the best possible utilization of the fuel by providing free and unhampered admission of the air of combustion or its gases to the fire inside the kiln. Kilns of the kind mentioned are usually .filled with material to such an extent that the introduction of the air of combustion or of the gas is made diiiicult owing to obstacles which the present invention seeks to remove.

In applicants device covered by United tates Patent 1,668,825 guide plates radiating from the center of the funnel and held 20. together in'the center by a plate are shown, the plate being covered by a cone to prevent the material to be treated from accumulating on the plate and forming an obstacle for the material following it.

According to the present invention this cone is used as a nozzle for supplying the seat of the fire with the air of combustion. Moreover, the discharge funnel is also provided with a ring nozzle, the nozzles being formed so that a projecting and rounded rim is arranged on top of their upwardly inclined slots whereby the material moving downwardly through the furnace is kept away from the openings and the air or is permitted to move freely upwards in direction of the nozzle openings.

One form of the invention is illustrated in the accompanying drawing, in which F1 1 is a longitudinal section of the lower part I of the furnace, Fig. 2, a top view of 1, partly in section, Fig. 3 a longitudinal section of the cone nozzle, Fig. 4 a top view of the same partly in section on the line gas the

and Fig. 6 a longitudinal section of the ring nozzle. Figs. 36 are drawn on a larger scale than Figs. 1 2.

Referring to the drawing, in the center above the point of connection of the guide plates a nozzle 1 is provided having a conical ccl, Fig. 3. Fig. 5 a longitudinal. nozzle shape with a convex base 2 and a. rounded rim 3 (Fig. The nozzle 1, whose openings 5 incline upwardly, distributes the air of combustion supplied by the piping 11 and its cross section is adapted to that of the kiln, the cross section of the nozzle being, for instance, circular in case cular kiln and square or elliptical if nace shows the same cross section. llurthcrmore the nozzle 1 may also pass horizontally through the entire furnace, but its longitudinal section must always show the shape described (Fig. 5).

The convex base 2 of the cone nozzle 1 (Fig. 3) forms an internally narrowing neck 4 carrying the nozzle slots 5 and the round ed rim 3 of the base 2 projects over this neck 4 to protect the slots 5 and prevent them from being clogged by the material dropping down to the funnel entrance.

On the circumference of the patented discharge funnel and somewhat above it in the brickwork 6 of the inner shell of the furnace a ring nozzle 7 may be provided as shown in Figs. 1, 2 and 5. This ring nozzle is onesided and represents one half of the conical or lougitiulinal nozzle, 8 being openings. 9 the projecting ring, 10 the convex end of the cone and 12 the air or gas supply.

In both cases the material moving down the furnace is kept away from the nozzle slots 5 and 8 by means of the projecting rims 3 and 9 to prevent'clogging. The nozzle openings 5 and 8 incline upwardly so that the air is guided to the seat of the lire and will. not alter its course, even if the lower doors of the kiln are opened for taking in fuel, the air entering through the doors being simp y guided the same way.

Instead of air. gas may enter the combution chamber in case of gas fired kilns. Or, under certain conditions gas may enter through the nozzle 1 and the airthrouglnozzle 7. I

I claim:

1. In combination. a discharge tunnel for kilns, a conical nozzle forming part of said discharge funnel and provided with upwardly inclined slots and a convex base forming part of the said nozzle and projecttil I I an signature. w EMANUEL "SOBE'K; 

